Consider the uplink of a CDMA system with a service with processing gain PG = 20 dB and target Eb/I0 = 9.95 dB. The number of users in the cell is Poisson distributed with mean ρ = 20. For a given...

Consider the uplink of a CDMA system with a service with processing gain PG = 20 dB and target Eb/I0 = 9.95 dB. The number of users in the cell is Poisson distributed with mean ρ = 20. For a given instant, the probability that a randomly chosen user is active is ν = 0.5. Perfect power control (constant received power control) can be assumed. Consider the following outage definition: a user is in outage if the interference amount is 10 times greater than the background noise amount. a) Determine the outage probability for a single-cell system. b) Consider a multiple-cell system where the interference from other cells is 50% of the own cell interference. Determine the outage probability in this case. c) Assume that the user activity is reduced to ν = 0.25. Consider a single-cell system and determine the maximum Eb/I0 for which the same outage probability is achieved as in a).